w124 estate rear suspension arms

[millo777]

I'm about to have a crack at replacing all the suspension arms at the rear of the w124, and was wondering whether the car needs to be under load before tightening to the recommended torque? and if so, does that mean simply jacking up the rear swing arm on the side being worked on, or does the full weight of car have to be on the wheels before tightening?

Anything else I should be weary of, or anything tricky that may need planning ahead?